Articles tagged with Coral Reefs
Long-standing human stressors like agricultural run-off and overfishing have contributed to coral reef die-offs. Coral communities were being transformed by human activities much earlier than previously thought, according to recent studies.
The Global Reef Expedition found that coral reefs in Tonga were moderately healthy, but fish communities needed attention. The report highlights the importance of marine conservation and recommends expanding management efforts to protect fish resources.
A new study reveals that rapid urbanization and poor waste management are the primary causes of coral reef loss in the South China Sea. The research, led by HKU marine ecologists, used geochemical techniques to analyze coral skeletons and found a significant increase in nitrogen pollution coinciding with Hong Kong's rapid development.
A new study reveals that tropical forests and coral reefs are being threatened by a combination of ongoing climate changes, increasingly extreme weather, and damaging local human activities. The research highlights the urgent need for international action to decrease CO2 emissions and reverse this trend.
Researchers found that existing marine reserves need to be much larger to conserve shark populations, with reserves extending between 10-50km required for significant improvements. This study provides options for managers to address declines in shark populations and ensure healthy oceans.
Scientists discovered dozens of new coral species during a recent expedition along the Great Barrier Reef, revealing that much of existing classification is deeply flawed. The team's findings suggest that biodiversity may be up to three times higher than previously thought.
Research suggests that maintaining a healthy size distribution of parrotfish in sea floor ecosystems is crucial for coral reef health. Experiments show that large parrotfish play a key role in controlling algae growth, and selective fishing practices could lead to an overgrowth of algae if these larger fish are removed.
A comprehensive multi-year study challenges previous findings that ocean acidification will negatively impact coral reef fish behavior. The research found that CO2 levels expected by the end of the century have a negligible impact on fish activity levels and ability to avoid predators.
A new study reveals that ocean acidification has no direct impact on the behavior of coral reef fish, contradicting previous high-profile studies. The exhaustive analysis, led by Université de Montréal researchers, found consistently normal behaviors in fish under predicted end-of-21st-century CO2 levels.
A comprehensive study of French Polynesia's coral reefs has been conducted, revealing the healthiest reefs are found around islands with low elevation. The study also found that cyclones and crown-of-thorns starfish outbreaks have decimated reefs in some areas.
A new study by Simon Fraser University reveals that sea levels in the central Indian Ocean have risen by nearly a meter over the last two centuries. The research provides new insights into historical sea level variability and its impact on coral reefs and islands.
A study by the Woods Hole Oceanographic Institution compared seawater from protected and impacted reefs in Cuba and Florida Keys, finding that protected reefs have higher microbial diversity and lower nutrient concentrations. This suggests that offshore and highly-protected reefs are healthier than nearshore reefs with less protection ...
A new social-ecological systems monitoring framework has been implemented to uncover drivers of coral reef conservation success, incorporating both social and ecological indicators. The framework, developed from Elinor Ostrom's work, sheds light on local coral reef management contexts, resource use, and stakeholders' perceptions.
New research reveals that community-led rotational fishing closures can increase fish populations on closed reefs compared to open ones, making them less scared of people and easier to catch.
A 16-year study in Papua New Guinea found that rotational fisheries closures increased fish biomass and improved catchability. Socially cohesive leadership and high levels of policy compliance were key factors in implementing the system.
A recent volcanic eruption created a new island in the South Pacific, and coral reefs have shown incredible resilience and recovery. The study found that one section of the island supported diverse coral reefs largely unaffected by the eruption, which provided a source of larvae to repopulate reefs around the rest of the island.
A new study by Rice University researchers warns that coral reefs in the Gulf of Mexico are on the brink of collapse due to rising temperatures and ocean acidification. The study found that even reducing greenhouse gas emissions to meet the Paris Agreement's targets may not be enough to preserve the reefs.
The 'blue boat' fleet, consisting of small fishing vessels painted blue, is stripping Pacific coral reefs of seafood, endangering food security for Pacific Island nations. The boats are allegedly operated by Vietnamese fishermen with no contract or insurance, and are traveling thousands of kilometers to fish illegally in Pacific waters.
Coral reefs in the Gulf of Mexico face extinction due to rising temperatures, acidification, and increased storm intensity. The region's reefs are expected to disappear by the end of this century if no action is taken to mitigate climate change.
Researchers found three distinct phases of reef growth since end of Pleistocene era, including periods of slower, deeper growth due to increased sediment and nutrient flux. The study provides a new model of reef growth that suggests the more protected parts of the reef might have been suitable for early coral development.
Researchers found parrotfish populations surge in damaged reefs, consuming microalgae and cyanobacteria that provide food for the fish. This 'feedback loop' helps coral recover as reef health improves, with parrotfish numbers declining once ecosystems stabilize.
Researchers found that playing healthy reef sounds through loudspeakers in dead coral patches doubled fish arrival and increased species diversity by 50%. This 'acoustic enrichment' method could help kick-start natural recovery processes on damaged coral reefs.
A study found that clownfish in Kimbe Bay are unable to adapt genetically to habitat changes and renew their population. The quality of the anemone providing a home to the fish is crucial to its survival, highlighting the urgent need for conservation efforts to protect these marine species.
Researchers found that internal waves can reduce coral bleaching by up to 88% and prevent severe heating events. This natural cooling process may offer hope for coral reefs, but its impact is uncertain due to climate change.
A University of Queensland-led study found that healthy mangroves can support coral reef fisheries by providing alternative nurseries for fish. This allows them to grow larger and head out to the reef as adults, increasing their chances of survival.
Scientists warn of excessive pesticide use in Australian waterways and the Great Barrier Reef, threatening aquatic plants and animals. Pesticide regulation has been deemed ineffective, but local efforts to reduce pollution show promise.
A long-term study found significant declines in live, hard corals on Great Barrier Reef island groups, with temperature stress and wave exposure identified as key drivers. The research highlights the importance of addressing water quality and climate change to prevent ecosystem collapse.
Researchers found that fish can pass on heat-tolerant genes to their children and grandchildren, allowing them to cope with warmer waters. This adaptation could help coral reef fish populations survive projected ocean warming of up to three degrees Celsius.
Researchers at the University of Delaware found that 3D-printed coral models do not harm fish behavior or coral survival. Fish showed no preference between native coral and artificial habitats, making biodegradable materials like cornstarch a promising alternative to plastic.
Biologists have discovered that coral reef fish take advantage of parental care to raise their own young. Genetic tests revealed that many parents were caring for mixed broods of young from different species. The study found evidence of both adoption and brood parasitism, with unrelated young fish benefiting from parental protection.
A new study reveals major changes in Australia's Great Barrier Reef over the past 91 years, with intertidal communities experiencing significant declines in species richness and diversity. The research highlights the importance of long-term monitoring to track changes in community structure and coral abundance.
A recent study on the Great Barrier Reef found that living coral cover can slow future reef dissolution due to ocean acidification. The experiment used a controlled system to simulate high CO2 conditions and showed that living corals were more resilient than dead ones, which would dissolve earlier.
Researchers have sequenced the genomes of corals and their microbial partners, revealing new insights into symbiotic relationships and nutrient sharing. The study aims to aid in the revival of threatened coral reefs by understanding how they interact with their environment.
A 150-million-year-old coral reef snapshot reveals a peak of diversity among marine animals, including fish, crabs, and snails. The study also finds evidence of parasites among these ancient creatures, shedding light on the complex ecosystems of the past.
Researchers suggest a bolder approach to safeguarding coral reefs by focusing on land as well as the ocean. Implementing strategies like renewable energy, aquaculture, and restoring vegetation can reduce global emissions and enhance people's livelihoods. Current approaches to coral reef conservation are failing, and addressing the root...
USC scientists discover coral passes beneficial algae colonies to offspring for survival advantage. The finding suggests corals can adapt to rising ocean temperatures through genetic mechanisms.
Researchers developed predictive tools to estimate sediment and nutrient levels in water. The low-cost sensors will help automate the monitoring process, enabling more frequent predictions of water quality changes.
Nearshore corals, which grow faster than offshore counterparts due to warmer temperatures, have experienced a decline in growth rates over the past decade. Climate change and coastal development are believed to be major contributors to this decline, with far-reaching implications for global coral reefs.
A massive ocean heatwave is approaching the Hawaiian Islands, threatening unique life on Earth. ASU is providing real-time monitoring of coral reef health through its Global Airborne Observatory and Planet satellite program to help minimize additional stress on corals.
A new study reveals that functioning coral reefs still exist and can be saved through three management strategies: protect, recover, and transform. These strategies aim to safeguard reef ecologies and ecosystem services into the future, prioritizing 'cool spots' with functioning coral communities.
Researchers found that severe marine heatwaves lead to immediate coral mortality and rapid decay, not just bleaching. This phenomenon is distinct from coral bleaching and will likely become more frequent as temperatures rise.
Scientists have found that severe marine heatwaves can lead to the death of coral animals themselves, causing the underlying skeleton to decay rapidly. This new understanding highlights the need for urgent action to preserve coral reefs and mitigate the impacts of climate change.
Researchers at Hiroshima University discovered that giant clam feces contain symbiotic algae zooxanthellae, which can be transferred to juvenile clams and establish a symbiotic relationship. This finding may help solve the mystery of how coral reefs acquire these essential algae.
Coral mass spawning events are becoming more frequent, allowing corals to spread their offspring across different reefs. This phenomenon improves the Great Barrier Reef's resilience and increases its recovery potential.
The study confirms the importance of fish larvae produced in no-take zones for the health of fish populations within nearby fishing zones. The accuracy of the model was tested with field data, validating its predictions and providing valuable insights for reef managers.
A 30-year study reveals that coral bleaching is not just caused by climate change, but also by reactive nitrogen from human activities. Nitrogen levels from sewage and fertilizers are causing phosphorus starvation in corals, leading to reduced temperature thresholds for 'bleaching'.
New research reveals coral reefs have retreated from tropical waters and established new reefs in more temperate regions over the last 40 years. This shift is attributed to climate change, which has warmed ocean temperatures, favoring corals' growth in subtropical areas.
A new study by Flinders University and the University of Melbourne found that artificial light pollution can prevent clownfish eggs from hatching. The presence of artificial light at night (ALAN) masks natural cues, leading to a zero success rate for test eggs incubated in its presence.
A study published in Nature Climate Change suggests that conserving a wide range of coral habitats is the best approach to protect these ecosystems from climate change. This strategy recognizes that corals can adapt rapidly to changing conditions, but also emphasizes the importance of protecting diverse habitats to provide future refug...
Researchers have documented surprising amounts of coral living in areas with less than 1% of the surface light, shedding light on deep-sea life and strategies for survival. The study found different corals use varying strategies to deal with low light levels, including changing pigments or symbionts.
A long-term study in the Seychelles found that repeat coral bleaching caused lasting changes to fish communities, with large predator fish declining and being replaced by seaweed-loving fish. The study suggests that under current levels of ocean warming, permanent changes to reef fishes are likely on most coral reefs globally.
Coral reefs face growing danger from climate change, local pollution, and habitat destruction. New interventions, such as breeding corals with greater heat resistance and genetic manipulation, show promise but vary in readiness levels.
Coral reefs, unchanged for 24 million years, are experiencing profound changes due to rapid climate change. Experts urge a rethink on conservation priorities in the face of these shifts, which exceed predictions. Carbon emissions reduction is key to sustaining coral ecosystems.
A new model developed by marine biologists has revealed that reef fish enter the 'danger zone' around invasive lionfish at similar rates to native predators. The study found that prey are up to twice as likely to be captured by lionfish than by native predators, highlighting the need for conservation efforts to protect vulnerable species.
Researchers found that cardinalfish, thought to be monogamous, engage in complex mating behaviors including infidelity and cannibalism. The study suggests that males can offset the energy costs of brooding eggs by eating them or accepting eggs from other females.
A new study found that over half a million corals were killed within 550 yards of the dredged channel, and that dredging impacts may have spread across more than 15 miles of Florida's reef tract. The researchers used satellite data to predict impacts on reefs below.
Researchers at Simon Fraser University discovered that tiny fish species around the world are a crucial food source for larger fishes on coral reefs. These 'cryptobenthic' fishes dominate larval communities near reefs and create a steady stream of babies that rapidly replaces each adult fish devoured on the reef.
A new study published in Science has found that tiny, mostly bottom-dwelling creatures called cryptobenthic reef fishes perform a critical role on coral reefs. These small fish supply almost 60% of the consumed fish food by constantly replenishing their populations.
Researchers discovered that tiny fish living in the gaps of coral reefs play a crucial role in sustaining the ecosystem. These 'cryptobenthics,' which include species like gobies and blennies, reproduce rapidly and are consumed by other animals, providing a vital food supply for larger species.
Tiny cryptobenthic reef fishes play a vital role in maintaining coral reef diversity and productivity by producing a steady stream of larvae to replace adults devoured by predators. These small fish contribute nearly 40% of reef-fish biodiversity and nearly two-thirds of near-reef larval fish pools.